MAX9736A
Mono/Stereo High-Power Class D Amplifier
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Versatile Pin-for-Pin Compatible Family of Filterless Class D Amplifers Offer Industry-Leading Solution Cost
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Features
- Independently Controlled Dual Paths
- Wide 8V to 28V Supply Voltage Range
- Spread-Spectrum Modulation Enables Low EMI Solution
- Passes CE EMI Limits with Low-Cost Ferrite Bead/Capacitor Filter
- Low BOM Cost
- High 67dB PSRR at 1kHz Reduces Supply Cost
- 88% Efficiency Eliminates Heatsink
- Thermal and Output Current Protection
- < 1µA Shutdown Mode
- Mute Function
- Space-Saving, 32-Pin TQFN Packages, 7mm x 7mm x 0.8mm (MAX9736A/B), 5mm x 5mm x 0.8mm (MAX9736D)
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The MAX9736A/B/D Class D amplifiers provide high-performance, thermally efficient amplifier solutions. The MAX9736A delivers 2 x 15W into 8Ω loads, or 1 x 30W into a 4Ω load. The MAX9736B/D deliver 2 x 6W into 8Ω loads or 1 x 12W into a 4Ω load.
These devices operate from 8V to 28V and provide a high PSRR, eliminating the need for a regulated power supply. The MAX9736 offers up to 88% efficiency at 12V supply.
Pin-selectable modulation schemes select between filterless modulation and classic PWM modulation. Filterless modulation allows the MAX9736 to pass CE EMI limits with 1m cables using only a low-cost ferrite bead and capacitor on each output. Classic PWM modulation is optimized for best audio performance when using a full LC filter.
A pin-selectable stereo/mono mode allows stereo operation into 8Ω loads or mono operation into 4Ω loads. In mono mode, the right input op amp becomes available as a spare device, allowing flexibility in system design. Comprehensive click-and-pop reduction circuitry minimizes noise coming into and out of shutdown or mute.
Input op amps allow the user to create summing amplifiers, lowpass or highpass filters, and select an optimal gain.
The MAX9736A/B/D are available in 32-pin TQFN packages and specified over the -40°C to +85°C temperature range.
Applications
- All-in-One PCs
- LCD/PDP/CRT Monitors
- LCD/PDP/CRT TVs
- MP3 Docking Stations
- Notebook PCs
- PC Speakers
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MAX9736A
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Software & Part Ecosystem
Evaluation Kits 2
MAX9736DEVKIT
Evaluation Kit for the MAX9736D
Features and Benefits
- 8V to 28V Single DC Power-Supply Operation
- Fully Differential Outputs
- Drives 2 x 6W into 8Ω Speakers in Stereo Mode
- Drives 1 x 12W into 4Ω Speaker in Mono Mode
- Shutdown and Mute Control
- Selectable Modulation Scheme
- Evaluates the MAX9736D in 32-Pin TQFN-EP Package
- Fully Assembled and Tested
Product Detail
The MAX9736D evaluation kit (EV kit) is a fully assembled and tested PCB that configures the MAX9736D Class D amplifier to drive 2 x 6W into a pair of 8Ω speakers in stereo mode, or 1 x 12W into a 4Ω speaker in mono mode for audio applications. The EV kit operates from an 8V to 28V DC power supply and is configured for 17dB gain. The MAX9736D EV kit accepts a pair of single-ended input signals and provides two sets of differential outputs for speakers.
The MAX9736D EV kit provides an option to control the shutdown, mute, modulation scheme, and mono mode of the MAX9736D. The EV kit includes convenient audio input and output connectors and the required output filters to ease evaluation.
Applications
- All-in-One PCs
- LCD/PDP/CRT Monitors
- LCD/PDP/CRT TVs
- MP3 Docking Stations
- Notebook PCs
- PC Speakers
MAX9736AEVKIT
Evaluation Kit for the MAX9736A and MAX9736B
Features and Benefits
- 8V to 28V Single DC Power-Supply Operation
- Fully Differential Outputs
- Drives 2 x 15W into 8Ω Speakers in Stereo Mode
- Drives 1 x 30W into 4Ω Speaker in Mono Mode
- Shutdown and Mute Control
- Selectable Modulation Scheme
- Evaluates the MAX9736A/MAX9736B in 32-Pin TQFN-EP Package
- Fully Assembled and Tested
Product Detail
The MAX9736A evaluation kit (EV kit) is a fully assembled and tested printed-circuit board (PCB) that configures the MAX9736A Class D amplifier to drive 2 x 15W into a pair of 8Ω speakers in stereo mode, or 1 x 30W into a 4Ω speaker in mono mode for audio applications. The EV kit operates from an 8V to 28V DC power supply and is configured for +17.1dB gain. The MAX9736A EV kit accepts a pair of single-ended input signals and provides two sets of differential outputs for speakers.
The MAX9736A EV kit provides an option to control the shutdown, mute, modulation scheme, and mono mode of the MAX9736A. The EV kit includes convenient audio input and output connectors and the required output filters to ease evaluation. The MAX9736A EV kit can also evaluate the MAX9736B after IC replacement (U1).
Applications
- All-in-One PCs
- LCD/PDP/CRT Monitors
- LCD/PDP/CRT TVs
- MP3 Docking Stations
- Notebook PCs
- PC Speakers